Machining apparatus for noncircular shapes
a technology of machining apparatus and non-circular shape, which is applied in the direction of process control, process control, instruments, etc., can solve the problem that the workpiece cannot be machined as intended to its desired outer shape, and achieve the effect of accurate tool position and improved machining precision
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embodiment 1
[0023]FIGS. 1 and 2 show a general machine configuration and a configuration block diagram of embodiment 1 of the present invention, respectively. In FIGS. 1 and 2, the same reference numerals are assigned to portions having the same functions as those in FIGS. 7 and 8. Further, in the following description, just the points of difference with the conventional apparatus will be principally described.
[0024]FIG. 1 is a diagram showing a machine configuration. A first acceleration sensor 6 that detects an acceleration component parallel to a line interconnecting the distal end of a tool 7 and the center of a workpiece 1 is disposed on an end surface of a saddle 11 that faces the workpiece 1, and an X-axis movable section 9 that causes the tool 7 to move is placed on the saddle 11. Here, the saddle 11 functions as an immovable section of a moving mechanism that causes the tool 7 to move rectilinearly, and the first acceleration sensor 6 functions as part of first detecting means that det...
embodiment 2
[0031]Next, embodiment 2 of the present invention will be described by reference to FIG. 3 and FIG. 4. In FIG. 3 and FIG. 4, the same reference numerals are assigned to portions having the same functions as those in FIG. 1 and FIG. 2 refer to like elements. Additionally, in the following description, the points of difference with embodiment 1 will be principally described. In the machine configuration of the present embodiment shown in FIG. 3, in order to increase the tool-moving distance in the X-axis direction without increasing the load inertial mass of the X-axis motor 10 that causes the tool 7 to move, the tool-moving mechanism (configured by the X-axis motor 10, the X-axis movable section 9, a middle carriage 16, etc.) is further configured to be movable in the X-axis direction by a second moving mechanism (configured by an XM spindle motor, an XM spindle ball screw, etc.). Specifically, the middle carriage 16, which is an immovable part of the moving mechanism, is in screw en...
embodiment 3
[0033]Next, embodiment 3 of the present invention will be described by reference to FIG. 5 and FIG. 6. Embodiment 3 is the same as embodiment 1 excluding a function of correcting gain and phase error of the first acceleration sensor 6 and the second acceleration sensor 15; therefore, below, just correction of the acceleration sensors will be described. FIG. 5 is a diagram showing a machine configuration example when implementing correction. During correction of the acceleration sensors, a predetermined correction-use position sensor 50 is used. This correction-use position sensor 50 is a sensor usually used in double-ball bar measurement used in the evaluation of the precision of the trajectory of machine tools, and is a rod-like distance sensor where metal balls are attached to both ends. The correction-use position sensor 50 is supported on its spindle side by a seat bitten by a chuck and on its cutting tool side by a magnet and a seat on a jig attached to the saddle 11. The corre...
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Abstract
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